diff --git a/Gemfile.lock b/Gemfile.lock
index cf6df45..e08dec1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -53,6 +53,12 @@ GEM
     coffee-script-source (1.12.2)
     concurrent-ruby (1.0.5)
     crass (1.0.3)
+    database_cleaner (2.0.1)
+      database_cleaner-active_record (~> 2.0.0)
+    database_cleaner-active_record (2.0.1)
+      activerecord (>= 5.a)
+      database_cleaner-core (~> 2.0.0)
+    database_cleaner-core (2.0.1)
     devise (4.4.0)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
@@ -188,7 +194,7 @@ GEM
     turbolinks (5.1.0)
       turbolinks-source (~> 5.1)
     turbolinks-source (5.1.0)
-    tzinfo (1.2.4)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     uglifier (4.1.3)
       execjs (>= 0.3.0, < 3)
@@ -209,6 +215,7 @@ PLATFORMS
 DEPENDENCIES
   byebug
   coffee-rails (~> 4.2)
+  database_cleaner
   devise
   dotenv-rails
   factory_bot_rails